We forget that it is an art of here and now; because it is with us every day and 18 we must have houses to live in, we are apt to think of them solely as dwelling places.
答案：(B) because
本句由兩個並列的原因子句組成：because it is with us every day，以及 because we must have houses to live in，第二個 because 在此保留以形成「兩項並列原因」的結構；although（雖然）、likewise（同樣地）、therefore（因此）皆不符合此處因果並列的邏輯。
本題大考中心未公布逐題答對率，以下不談數據，只談觀念。
四個都是連接用的字，中文各有各的道理，很容易一個一個代進去讀語感。therefore 尤其誘人，因為這一句後半確實是結果——我們往往只把房子當成住的地方。
這一題適合把並列結構的判準完整走一次，分三步。第一步，先找對等連接詞：空格前面有一個 and——because it is with us every day and ______ we must have houses to live in。第二步，確定 and 連的是哪兩樣。and 可以連名詞、連片語、也可以連子句，層級抓錯就整題錯；這裡 and 後面是一個完整的子句（we must have houses to live in），所以前面對應的那一段也必須是同一層級的東西，正是 because it is with us every day 這個副詞子句。第三步，從已經寫出來的那一邊反推空白的那一邊。依據在空格左邊：左邊已經寫死是 because 引導的原因子句，右邊照抄，所以空格只能是 because。整句還原成 because it is with us every day and because we must have houses to live in, we are apt to ...（因為它天天都在身邊，也因為我們非得有房子住不可，我們往往……）。這三步的順序不能顛倒，同一篇的第 19、20 題也走同一條路，三題連著練最省力。
although（雖然）是讓步，會讓兩個並列的子句一正一反，但這裡兩個都是原因，方向必須一致。likewise（同樣地）與 therefore（因此）都是轉承副詞，不是從屬連接詞，後面不能直接帶一個子句去跟前面的 because 子句並列；而且真正的結果子句在逗號後面（we are apt to ...），therefore 就算要用也擺錯位置了。
because A and because B（因為 A，也因為 B）、be apt to V（往往會、容易……）、think of A as B（把 A 當成 B）、dwelling place（住所）、solely（僅僅、只）、likewise（同樣地）
Architecture is an art. Any art must give us pleasure; if it doesn't, either it is bad art or we are abnormally blind. We are in general insensitive to architecture 16 an art and to the joy it may bring to us. It is the constant nearness of architecture during our life that has 17 us in this way.
We forget that it is an art of here and now; because it is with us every day and 18 we must have houses to live in, we are apt to think of them solely as dwelling places. Therefore we think of architecture as some vague, learned thing having to do with French cathedrals or Italian palaces or Greek temples, 19 with New York or Chicago streets or Los Angeles suburbs.
This false belief has strengthened in us until our eyes are 20 and our minds are deadened to all the beauty that is being created around us today. Eventually we lose all the fine deep pleasure that we might otherwise experience from our ordinary surroundings.